CoZroom Sleeping Pack Eyes Masks with Ears Plugs Set- Comfortable and Soft- Include Carry Pouch for Eyes Masks (Blue and Black) and Ear Plugs (Yellow) - for Travel Meditation,Resting HI-FI STEREO SOUND and STRONG BASS: Enjoy perfect realistic human voice of music, movies, and your phone calls. Distortion &lt; 1% gives you perfect dynamic clear sound; Advanced 40mm large-diameter drivers for clarity and balance across the entire audio spectrum delivers strong bass, crisp and crystal sound. BUILT TO STAY COMFORTABLE: The Memory-protein ear cushion simulate human skin texture, ensuring lasting comfort. The stainless steel slider and softly padded headband allows you to find the perfect fit without constraint and provide excellent durability. STYLISH AND FUTURE EXTERIOR & MAKE YOUR LIFESTYLE MORE ECO-FRIENDLY: modern design makes your vision experience a sense of beauty and fashion. Built-in rechargeable lithium battery can be charged via USB cable and provides 4-6 hours music playing time. You can also recharge from your laptop, desktop or power bank (charging cable included).Meanwhile, makes it an ideal birthday gift and memorial gift. HANDS-FREE CALL & BUILT-IN MIC: Please Note: The Microphone only works in the wireless mode. Bluetooth headphones provide a quick and stable connection with your Bluetooth enabled devices like cell phones, tablets, pc, TVs within 33 feet, with a high-quality built-in microphone for hands-free calls. ADDITIONAL FUNCTIONS OF MICRO SD CARD & FM RADIO Many additional functions can be found.Enjoy your favorite music at relaxing time via inserting micro SD card , it will automatically play. What's more, FM radio function is necessary,100HZ-20KHZ frequently range ,search and choose your favorite channel